Elevator-stop.



Patented 'Aug. l2, I902.

E. C. EDWARDS. ELEVATOR STOP. (Applicltion' filed May 10, 1902.)

(No Model.)

QY Twp? P w. 1% E TH: Noun Pnins on Pumuuma, WASHINGTON. n, c.

UNITED STATES PATENT OFFICE.

ELB ERT C. EDWARDS, OF EMPORIA, KANSAS.

ELEV OR-3T0 P.

SPECIFICATION forming part of Letters Patent No. 706,644, dated August 12, 1902.

V Application filed May 10,1962. berial No. 106,715. (No model.)

To aZZ whom it-may cmtccrn: Be it known that I, ELBERI O. EDWARDe'a citizen of the United States, residingat Emporia, in the county of Lyons, State of Kansas, have invented certainxnew and useful IHI- provements in Elevator-Stops, of which the following is a specification, reference being bad therein to the accompanying drawings.

This invention relates] to a rotary elevatorstop; and particularly to a construction of rotary dog carried by a moying cage and adapted to engage a stationary rack. I

The invention has for'an object to provide a simple and economicallyoonstructed rotary dog which may be balancedto move quickly and to positively engage a rack in' the event of the breaking ofa lifting-cable or the slacking thereof, so as to'hold and firmly support the car. i

A furtherobject is to provide this dog with a stop-block adapted to have a firm bearing upon the frame in which the dog ismounted, so that the car or cage will be supported from this frame when the frame' is' engaged with the rack upon the side of the well.

Other and further objectsand advantages of the invention will be hereinafter set forth- In the drawings, Figure 1 is a side elevation with the dog released from the rack andth'e cage supported by the lifting-cable; Fig. 2, a similar view showing the dog engaged with the rack and thecable broken, and Fig. 3 is an enlarged horizontal section through theconfiguration. In the operationof the invenframe supportingthe dog. 7

Like letters of reference refer to like parts in the several figur'esjof the drawings.

The letter A designates the guides supported by the side walls of an elevator-shaft,which may be of any ordinary construction and provided with a rack A upon either one or both sides thereof, and when upon both sides the structureof dog hereinshow'n' is duplicated upon the opposite side. A cage or car A of any suitable construction is adapted to travel upon these guides in the usual manner and. is rigidly connected to a frame O by means of hangers B, suitably connected at one end to the upper portion of the car or cage.

For the purpose of supporting the rotary stop a frame 0 of any desired construction is provided and at opposite sides engaging vflanges O are formed to ride upon thegiiides A in the movement of -the car A while the rod B passes through this frame and is provided above the samewith a supporting face or head 0 by which the weight of the car A will be supported when the lifting-cable is broken or slackened. This head rests'upon the upper face of the cross-bar 0 and below this face a stop B is provided upon the rod B, with a coiled spring B extending between the stopland the under face of the crossbar C for the purpose of quickly projectingthe rod B downward through theframe to actuate the rotary dog D, mounted therein. This dog D. consists of a disk-centrally pivoted at D within the lower. cross-piece O of the frame 0 and is' operatively connected with the rod Bby means of a link D pivotally connected at its opposite ends to the dog and rod, where- :by the movementof the rod rotates the dog upon itspivotfto throw the point D thereof into or o,ut.of ,the path of the rack A. This :dog is provided beneath its pivot and upon one or both sides with a stop-block D, rigidly connected to the dog and adapted to engage the under face of the lower cross-bar C, so that'the supporting strain against furtherrotation is removed from the other parts, which are liable to be broken,and carried by the stronger cross-bar C by the engagement of the stop-blocks therewith. For the purpose of "guiding the travel of'the rod B without twisting or rotation this rodis shown of angular formation passing through sockets of similar tion it will be seen that when the caris supported by the frame the upward tension upon the rod connecting thecable holds thedog out of engagement with the rack and places the spring under tension,while the frame carrying the dog freely travels upon the guides in the movement of the car. In the event of breakage of the lifting-cableor sudden slack thereof the spring B and the weight of the rod shift the rotary dog, so as to bring the point thereof into the path of the rack, engaging a tooth to stop and hold the frame 0 in engagement with the rack and support the car by means of hangers B, carried by the frame for the connecting-rod B, whille the stop-blocks D relieve the other parts from ICO the strain,which is thereby transmitted to the under side of the frame. It will be notedthat the circular form of the rotary dog balances the same, so that it can be easily and freely moved when necessary. It will be obvious that while the dog is shown as supported by a'frame above the car it may be supported upon aside of the car or in any position found desirable.

It is apparent that changes may be made in the construction and configuration of the invention without departing from the spirit thereof as defined by the appended claims.

Having described my invention and set forth its merits, what I claim, and desire to secure by Letters Patent, is

..1. In anelevator-stop, a frame comprising parallel men1bers,a reciprocating supportingrod,-a lifting-cable connected thereto, a fixed rack,a dog pivoted between said members and provided with a lateral projection to engage said frame in one position, and a connectinglink pivoted at opposite ends to said rod and to said dog; substantially as specified.

2. In an elevator-stop, a reciprocatingsupporting-rod, alifting-cable connected thereto, afixed rack, a dog pivoted to engage said rack in one position, a connecting-link extending from said rod to said dog, a sliding frame in which said dog is mounted, and a stop-block carried by said dog to engage said frame; substantially as specified.

3. In an elevator-stop, a reciprocating supporting-rod, a lifting-cable connected thereto, a fixed rack, a dog pivoted to engage said rack in one position, a connecting-link extending from said rod to said dog, a sliding frame in which said dog is mounted, a stop-block carried by said dog to engage said frame, a collar supported by said rod, and a spring extending between said frame and collar; substantially as specified.

4. In an elevator-stop, a sliding frame, a rotarydog mounted therein, a rack at one side of said frame, a peripheral point carried by said dog to engage said rack, a stop-block carried by said dog to engage said frame, and means for rotating said dog upon its pivot; substan-. tially as specified. I

5. In an elevator-stop, a sliding frame, a totary dog mounted therein, a rack at one side of said frame, aperipheral point carried by said dog to engage said rack, a stop-block carried by said dog to engage said frame, a car heneath said frame, a lifting-cable, a rod passing through said frame and connecting said cable and dog, and a supporting-head upon said rod; substantially as specified.

In testimony whereof I affix my signature in presence of two Witnesses.

ELBERT O. EDWARDS.

Witnesses:

W. W. J ONES, F. P. WARREN. 

